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		<div class="article-content markdown-body px-2 sm:px-6 md:px-8 pb-8">
			<p>本章主要内容为hook后参数如何打印和构造</p>
<p>环境：</p>
<blockquote>
<p>设备：pixel XL</p>
<p>系统版本：Android 7.1</p>
</blockquote>
<span id="more"></span>

<h3 id="数组"><a href="#数组" class="headerlink" title="数组"></a>数组</h3><h6 id="改变app的返回结果"><a href="#改变app的返回结果" class="headerlink" title="改变app的返回结果"></a>改变app的返回结果</h6><p>源码片段</p>
<pre><code class="java">char arr[][] = new char[4][]; // 创建一个4行的二维数组
        arr[0] = new char[] { '春', '眠', '不', '觉', '晓' }; // 为每一行赋值
        arr[1] = new char[] { '处', '处', '闻', '啼', '鸟' };
        arr[2] = new char[] { '夜', '来', '风', '雨', '声' };
        arr[3] = new char[] { '花', '落', '知', '多', '少' };
        Log.d("SimpleArray", "-----横版-----");
        for (int i = 0; i &lt; 4; i++) { // 循环4行
//            Log.d("SimpleArraysToString", Arrays.toString(arr[i]));
//            Log.d("SimpleStringBytes", Arrays.toString (Arrays.toString (arr[i]).getBytes()));
            for (int j = 0; j &lt; 5; j++) { // 循环5列
                Log.d("SimpleArray", Character.toString(arr[i][j])); // 输出数组中的元素
            }
            if (i % 2 == 0) {
                Log.d("SimpleArray", ",");// 如果是一、三句，输出逗号
            } else {
                Log.d("SimpleArray", "。");// 如果是二、四句，输出句号
            }
        }
</code></pre>
<ul>
<li><p>hook<code>Character.toString()</code>获取参数和返回值并改变返回结果</p>
<blockquote>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118223637807.png" class="" title="image-20231118223637807">
</blockquote>
</li>
<li><p>hook<code>charArrays.toString()</code></p>
<blockquote>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118223800036.png" class="" title="image-20231118223800036">

<ul>
<li><p>这里的X值因为格式的问题打印不出来，使用<code>JSON.stringify()</code>方法来打印</p>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118223947493.png" class="" title="image-20231118223947493"></li>
</ul>
</blockquote>
</li>
<li><p>hook<code>charArray.getBytes()</code></p>
<blockquote>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118224238240.png" class="" title="image-20231118224238240">

<ul>
<li>有点奇怪，在搜索实例的时候出现了搜索不到的情况，要等app运行了很久（大概一个小时左右了）才能搜索到实例。看报错是编译优化导致的找不到类名。应该是设备或者系统版本的问题。没搜索到类似的问题，回头测试一下</li>
<li><strong>之前是Android 10.0换了7.1没有这个问题了</strong></li>
</ul>
</blockquote>
</li>
</ul>
<h3 id="对象-x2F-多态、强转"><a href="#对象-x2F-多态、强转" class="headerlink" title="对象/多态、强转"></a>对象/多态、强转</h3><p><strong>子类可以强转为父类，父类不能强转为子类</strong></p>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118224940766.png" class="" title="image-20231118224940766">

<ul>
<li>子类强转为父类ok</li>
</ul>
<h3 id="接口"><a href="#接口" class="headerlink" title="接口"></a>接口</h3><p>也可以在hook代码中实现接口</p>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118225044474.png" class="" title="image-20231118225044474">





<h3 id="枚举"><a href="#枚举" class="headerlink" title="枚举"></a>枚举</h3><h6 id="获取枚举的实例和类"><a href="#获取枚举的实例和类" class="headerlink" title="获取枚举的实例和类"></a>获取枚举的实例和类</h6><img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231118225148951.png" class="" title="image-20231118225148951">

<h3 id="Map"><a href="#Map" class="headerlink" title="Map"></a>Map</h3><h6 id="打印以及hook-Map"><a href="#打印以及hook-Map" class="headerlink" title="打印以及hook Map"></a>打印以及hook Map</h6><p>Map的源码片段</p>
<pre><code class="java">        Map&lt;String, String&gt; mapr0ysue = new HashMap&lt;&gt;(); // 创建Map集合对象
        mapr0ysue.put("xiaoeryu 1", "张三"); // 向Map集合中添加元素
        mapr0ysue.put("xiaoeryu 2", "李四");
        mapr0ysue.put("xiaoeryu 3", "王五");
        mapr0ysue.put("xiaoeryu 4", "赵六");

        Log.d("5map", "key值toString"+mapr0ysue.toString());
</code></pre>
<p>打印Map</p>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231119233324076.png" class="" title="image-20231119233324076">

<ul>
<li>打印可以使用命令<code>frida -U com.xiaoeryu.printout -l lesson5.js</code>加载脚本就打印出来了</li>
</ul>
<p>hook的话需要添加<code>-f</code>参数重新启动才能hook到</p>
<p>命令：<code>frida -U -f com.xiaoeryu.printout -l lesson5.js --no-pause</code></p>
<img lazyload="" src="/images/loading.svg" data-src="/2023/11/18/Frida%E6%9E%84%E9%80%A0%E6%95%B0%E7%BB%84%E3%80%81%E5%AF%B9%E8%B1%A1%E3%80%81Map%E5%92%8C%E7%B1%BB%E5%8F%82%E6%95%B0/image-20231119233616888.png" class="" title="image-20231119233616888">



<p>测试Demo<a class="link" target="_blank" rel="noopener" href="https://github.com/xiaoeeyu/printout">源码<i class="fa-solid fa-arrow-up-right ml-[0.2em] font-light align-text-top text-[0.7em] link-icon"></i></a></p>
<p>hook<a class="link" target="_blank" rel="noopener" href="https://github.com/xiaoeeyu/printout_hook">脚本<i class="fa-solid fa-arrow-up-right ml-[0.2em] font-light align-text-top text-[0.7em] link-icon"></i></a></p>

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		<ol class="nav"><li class="nav-item nav-level-3"><a class="nav-link" href="#%E6%95%B0%E7%BB%84"><span class="nav-text">数组</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#%E5%AF%B9%E8%B1%A1-x2F-%E5%A4%9A%E6%80%81%E3%80%81%E5%BC%BA%E8%BD%AC"><span class="nav-text">对象&#x2F;多态、强转</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#%E6%8E%A5%E5%8F%A3"><span class="nav-text">接口</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#%E6%9E%9A%E4%B8%BE"><span class="nav-text">枚举</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Map"><span class="nav-text">Map</span></a></li></ol>

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